Anti-clogging self-cleaning vibrating screen system based on multi-mode impact

Abstract

This invention discloses a multi-mode impact-based anti-clogging self-cleaning vibrating screen system for crushed stone, comprising a screen box support, a screen box mounted on the support, a vibrating motor mounted on the screen box, a screen mesh disposed inside the screen box for vibrating and screening the crushed stone, and a crushed stone conveyor belt whose discharge end connects to the screen box inlet. The system further comprises: several impact components, a screen mesh camera device, an impact control module, a screen mesh clogging identification module, and a crushed stone sensor; the screen mesh is divided into several screening surfaces along its length. During operation, the impacting components do not accumulate due to the tilt of the screen mesh, nor do they affect material movement or screening. Furthermore, the system can intelligently switch between different operating modes, improving cleaning efficiency while reducing energy consumption.

Description

Technical Field

[0001] This invention relates to an anti-clogging, self-cleaning vibratory screening system for crushed stone based on multi-mode impact. Background Technology

[0002] In the field of infrastructure project construction, using self-produced rubble for crushing is a common on-site material production and supply method. Because the reserves of self-produced rubble are relatively small compared to large-scale crushing mines, and production is highly mobile, the investment in building self-produced crushing aggregate production lines is relatively small, and the technical standards are relatively low. To reduce production costs, the rubble raw materials, production lines, and finished product warehouses used in self-produced crushing aggregate production lines are often stored in the open air without rain protection and drying functions, resulting in high moisture content in the rubble raw materials and crushed aggregate mixture. Even worse, to improve the cleanliness of manufactured sand, some production lines use wet production processes, resulting in even higher moisture content in the manufactured sand.

[0003] During the vibrating screening process, due to the high moisture content of fine aggregates such as manufactured sand, stone powder, and stone chips, they often agglomerate due to surface tension and capillary effect, clogging the screen holes. This prevents some fine aggregates that should have passed through the screen from passing through, thus mixing with coarse aggregates with a fineness modulus of 4.75-9.5mm and directly transported out from the same level of belt conveyor, ultimately causing the following problems: (1) The coarse aggregates with a fineness modulus of 4.75-9.5mm have excessive powder content, increased proportion of fine particles, and poor gradation curve, affecting the workability of concrete. (2) The fine aggregates below 4.75mm have a coarse fineness modulus and poor gradation curve, affecting the workability of concrete. (3) Low production efficiency, requiring frequent shutdowns to clean the screens.

[0004] In response, because wet aggregates often clog the screens, resulting in low screening efficiency and poor screening effect, production line managers often control the screen aperture size of the smallest screen to 4.5mm, that is, reduce the probability of wet aggregate clogging by increasing the screen aperture size. However, although increasing the screen size can reduce the frequency of downtime for screen cleaning, it has the following disadvantages: (1) It further increases the proportion of coarse particles in fine aggregates with a fineness modulus of less than 4.75mm, resulting in a poor gradation curve and deteriorating the workability of fine aggregates. (2) It increases the proportion of coarse particles in coarse aggregates with a fineness modulus of 4.75-9.5mm, resulting in a poor gradation curve and affecting the workability of concrete.

[0005] Currently, similar phenomena exist in the production of manufactured sand for engineering construction across the country, including some commercially produced manufactured sand from minerals. This results in a generally coarser fineness modulus and poor gradation curves for manufactured sand, failing to meet the requirements for medium sand in Zone II. Consequently, concrete workability deteriorates, mix proportion adjustment and control become more difficult, the amount of cementitious materials such as cement increases, and the requirements for admixtures become more stringent, thus significantly increasing the cost of concrete.

[0006] During the crushing process, screen clogging is caused by a variety of factors. Generally, it is due to irregular shapes of the stone, a large number of flaky particles or particles at the mesh opening, the thickness of the screen wire, the shape of the mesh opening, and the high moisture content of the material, which cause the crushed stone to get stuck in the screen opening and be difficult to remove. In this case, general cleaning methods are no longer applicable. Common targeted cleaning methods include high-pressure water flushing, brushing, and impact.

[0007] (1) High-pressure water flushing method. The high-pressure water flushing method has the advantages of being simple and direct. It is effective for materials with small particles, high humidity and good adhesion. However, it is limited to wet-process manufactured sand production and is not suitable for dry-process production. At the same time, the high-pressure flushing water contains a large number of solid suspended particles. Direct discharge will cause a major environmental problem and additional wastewater treatment measures are required, which increases the production cost.

[0008] (2) Brush method. Chinese patent (application number 2021216501975) discloses a vibrating screen with self-cleaning function, which requires a metal brush to be installed above the screen, which will block the material during sand and gravel screening; in addition, the brush needs to be stopped to run, which affects the continuity of mechanical operation.

[0009] (3) Impact Method. The impact method involves striking the screen to vibrate it, causing particles stuck in the screen holes to dislodge and resolve clogging issues. Bouncing balls are a typical example of using impact to clean the screen, effectively preventing clogging. Bouncing balls are generally installed between the perforated plate and the screen frame of the vibrating screen. The power of the vibrating screen causes the bouncing balls to bounce back and forth between the perforated plate and the screen frame, cleaning the screen and increasing screening output. While the bouncing ball method has many advantages, the bouncing balls themselves are relatively small in diameter and require a sealed space for use, generally suitable for light-duty fine vibrating screens such as rotary vibrating screens. Sand and gravel screening typically uses large linear vibrating screens with inclined screens. Using bouncing balls will cause them to accumulate at the lower end of the screen due to gravity, making it difficult to ensure a clean upper screen. In response, Chinese patent (application number 2015200589463) discloses a screen plate mounting structure with a vibrating device. This structure uses a basket at the bottom to control the movement range of the bouncing balls, ensuring that the impact of the bouncing balls is evenly distributed on the screen surface and reducing the problem of the bouncing balls accumulating at the lower end. However, when used in inclined linear vibrating screens, it still cannot fundamentally solve the problem of the bouncing balls accumulating at the lower end of the screen due to gravity. Furthermore, the basket at the bottom affects the grading and screening of materials, and the basket itself becomes another screen, causing fine aggregates to accumulate in the basket and reducing screening efficiency. At the same time, this device has a complex structure, significantly increasing the mass of the screen plate and thus the energy consumption of the vibrating screen, which is detrimental to the vibrating screening of the screen plate and unsuitable for large equipment.

[0010] In addition, Chinese patent (application number 2021228813728) discloses a self-cleaning vibrating screen plate with a flexibly connected striking rod on the screen plate body. During the vibrating screen's operation, the striking rod generates additional vibration under the drive of the screen machine, impacting the screen surface and causing particles stuck in the screen holes to fall off. However, because the striking rod is only connected at one end, the bounce height of each segment of the striking rod is different. The connecting part is close to the screen plate, and the part near the connecting part has a small bounce amplitude and small impact force, while the end has a large bounce amplitude and large impact force. Therefore, the vibration force distribution during the impact on the screen plate is uneven, making it difficult to clean the corners and edges. Furthermore, since the working principle of the striking rod is to bounce up under the vibration of the screen plate and then fall to impact the screen plate, the fixed position of one end of the striking rod greatly affects the bounce of the striking rod and the instantaneous impact force on the screen plate. This results in the striking rod needing to reach a large mass to achieve the desired effect, leading to low cleaning efficiency and high energy consumption. Furthermore, due to the overly simplistic design of the structure's motion trajectory, the vibration cleaning effect from impacts and knocks during actual production is extremely limited. Summary of the Invention

[0011] While bouncing balls are often used to clean screens in small-scale, fine screening operations, linear vibrating screens are commonly used in the field of engineering construction for crushed stone screening. These screens are relatively large and the screens are arranged at an angle, which limits the use of bouncing balls. To address these issues, the present invention aims to provide a multi-mode impact-based anti-clogging self-cleaning crushed stone vibrating screening system.

[0012] The present invention is achieved through the following technical solution.

[0013] A multi-mode impact-based anti-clogging self-cleaning crushed stone vibrating screening system includes a screen box support, a screen box mounted on the screen box support, a vibrating motor mounted on the screen box, a screen mesh mounted inside the screen box for vibrating and screening the crushed stone, and a crushed stone conveyor belt whose discharge end is connected to the screen box inlet. The system is characterized by further including: several impact components, a screen mesh camera device, an impact control module, a screen mesh clogging identification module, and a crushed stone sensor.

[0014] The screen is divided into several screening surfaces along its length.

[0015] A plurality of striking components are arranged in a one-to-one correspondence with a plurality of screening surfaces. Each striking component includes a plurality of magnetic striking bodies uniformly arranged below the screen along the width of the screen, a connecting rope evenly radially distributed around the striking body, a clamping component, and a receiving component arranged below the striking body that can move up and down. One end of the connecting rope is connected to the striking body, and the other end of the connecting rope is fixedly connected to or detached from the screen through the clamping component. When the connecting rope is fixedly connected to the screen, the receiving component descends to avoid the resonating striking body, and the striking component is in striking working state at this time. When the connecting rope is detached from the screen, the receiving component rises to the vibration center position of the striking body to receive and fix the striking body, and the striking component is in idle working state at this time.

[0016] The crushed stone sensor is installed at the discharge port and the inlet of the screen box. When the crushed stone sensor does not detect crushed stone at either the inlet or the discharge port of the screen box, it sends a camera command to the camera device.

[0017] The camera device is installed on the inner wall of the top of the screen box to obtain the original image of the screen and to receive the camera command to obtain the real-time image of the screen, and to send the original image and real-time image information of the screen to the screen blockage identification module.

[0018] The screen blockage identification module includes: sending a stop command to the crushed stone conveyor belt at regular intervals to control the crushed stone conveyor belt to stop conveying crushed stone; receiving the original screen image and sequentially numbering the screening surfaces of the screen in the original screen image; receiving the real-time screen image and comparing it with the original screen image to identify the screening surfaces in the screen that are blocked, and sending the number of the blocked screening surfaces to the tapping control module, while simultaneously sending a start command to the crushed stone conveyor belt to control the crushed stone conveyor belt to convey crushed stone;

[0019] The tapping control module includes: controlling the snap-fit ​​component of the corresponding tapping component according to the number of the screen surface where the blockage occurs, so that the connecting rope and the screen can switch between two states: fixed connection or disconnection; and controlling the receiving component to lower or raise accordingly, thereby changing the working state and working time of the corresponding tapping component, so that the system can perform a global sleep, global tapping or fixed-point tapping working mode.

[0020] Preferred:

[0021] The global sleep mode means that when the number information of the blocked screening surface is empty, the knocking control module controls all knocking components to be in an idle working state, so that when the vibrating screen is working, all knocking components will not knock on the screen.

[0022] The global tapping refers to the following: when there are multiple numbers in the numbering information of the blocked screening surface and these numbers are not consecutive, the tapping control module groups the tapping components. First, it controls the first group of tapping components to enter the tapping working state, while the other tapping components are in the idle working state. Then, it controls the second group of tapping components to enter the tapping working state, while the other tapping components are in the idle working state. This process is repeated in sequence. In this way, when the vibrating screen is working, multiple groups of tapping components will tap the corresponding screening surface of the screen in sequence.

[0023] The fixed-point tapping means that when there is only one number in the numbering information of the blocked screening surface, or when there are multiple numbers and the numbers are consecutive, the tapping control module controls the tapping component corresponding to the screening surface to be in the tapping working state, while the tapping components at other positions are in the idle working state. In this way, when the vibrating screen is working, the tapping component will only tap the screening surface of the screen that needs to be tapped.

[0024] Preferably, in the global striking process, the striking control module groups the striking components sequentially along the conveying direction of the crushed stone on the screen, thereby enabling multiple groups of striking components to sequentially and cyclically strike the screen in a wave-like manner.

[0025] Preferably, along the length of the screen, each of the striking components at odd-numbered positions has n striking bodies, and each of the striking components at even-numbered positions has m striking bodies, where n ≠ m, 2 ≤ n ≤ 5, and 2 ≤ m ≤ 5.

[0026] Preferably, the receiving component includes a lifting member fixed on the screen box support and located below the striking body, a receiving groove disposed on the top of the lifting member for receiving the striking body, and an electromagnet disposed in the receiving groove.

[0027] Preferably, the lifting component is a hydraulic cylinder or a pneumatic cylinder.

[0028] Preferably, the striking body is spherical or frustum-shaped, and the surface of the striking body is coated with a polytetrafluoroethylene coating.

[0029] Preferably, the striking body has a filling cavity inside, and the outer wall of the striking body has a filling hole communicating with the filling cavity. The filling hole is covered with a removable sealing cap. The filling cavity is filled with fillers of different weights to adjust the weight of the striking body.

[0030] Preferably, the connecting rope is an elastic rope, and the striking body is connected to the connecting rope in at least two directions.

[0031] Preferably, the latching component is an electromagnetic latch, which includes an upper latch fixed to the bottom of the screen with the latch facing downward, a lower latch fixed to the screen box support with the latch facing upward and engaging with the upper latch, a lifting spring disposed within the lower latch, a magnetic fixing head housed in the slot formed by the lower and upper latches, and a guide groove disposed on one side of the lower latch and offset from the upper latch; electromagnets are disposed inside the upper and lower latches; and the connecting rope passes through the guide groove and connects to the fixing head.

[0032] Compared with the prior art, the present invention has at least the following beneficial effects:

[0033] 1) The system of the present invention is equipped with a striking component. The striking bodies in the striking component are arranged in a dotted manner below the screen through connecting ropes. It not only has the same advantages as the traditional bouncing ball for cleaning the screen, but also the striking bodies will not gather as the screen tilts, and will not affect the movement of materials or the screening.

[0034] 2) In the system of the present invention, the connecting rope is connected to the screen through the snap fastener, and a receiving component that cooperates with the striking body is provided below the screen. The snap control module controls the snap fastener and the receiving component to perform corresponding actions to change the working state and working time of the striking component. Different working modes of the system can be switched, which can not only improve the cleaning effect, but also reduce energy consumption.

[0035] 3) In the system of the present invention, by setting up a crushed stone sensor, a camera device, and a screen blockage identification module and a knocking control module, the blockage of each screen surface in the screen can be analyzed and identified in real time. This enables the system of the present invention to intelligently, automatically and in real time select the appropriate working mode from global sleep, global knocking or fixed-point knocking, thereby achieving self-cleaning in the crushed stone vibration screening process. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the system structure;

[0037] Figure 2 This is a block diagram illustrating the working principle of this system;

[0038] Figure 3 A schematic diagram of the structure of the striking component when it is in an idle working state;

[0039] Figure 4 This is a structural diagram of the snap-fit ​​connector;

[0040] Figure 5 Right view of the connector;

[0041] Figure 6 This is a schematic diagram of the structure of the striking object;

[0042] Figure 7A schematic diagram illustrating one method of connecting the striking body to the connecting rope;

[0043] Figure 8 This is a schematic diagram of a second method of connecting the striking body and the connecting rope;

[0044] The meanings of the labels in the above figures are as follows: 1. Screen box support; 2. Screen box; 3. Crushed stone sensor; 4. Crushed stone conveyor belt; 5. Screen mesh; 501. Screening surface; 6. Impact assembly; 601. Impacting body; 601. Filling cavity; 6011. Filling hole; 6012. Sealing cover; 6013. Connecting rope; 602. Clip; 603. Upper buckle; 6031. Fixing head; 6032. Lifting spring; 6033. Lower buckle; 6034. Guide groove; 6035. Receiving assembly; 604. Lifting component; 6041. Receiving groove; 6042. Screen mesh camera device; 7. Detailed Implementation

[0045] To facilitate understanding of the present invention, a more comprehensive description of the present invention will be given below with reference to the accompanying drawings, which illustrate several embodiments of the present invention. However, the present invention can be implemented in different forms and is not limited to the embodiments described in the text. Rather, these embodiments are provided to make the disclosure of the present invention more thorough and complete.

[0046] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the specification of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0047] The present invention will be further described in detail below with reference to the accompanying drawings.

[0048] Example

[0049] Please refer to the anti-clogging self-cleaning vibratory screening system for crushed stone based on multi-mode impact. Figures 1 to 8 It includes a screen box support 1, a screen box 2 set on the screen box support 1, a vibrating screen motor (not shown in the figure) set on the screen box 2, a screen 5 set in the screen box 2 for vibrating and screening the crushed stone, a crushed stone conveyor belt 4 whose discharge end is connected to the inlet of the screen box 2, several impact components 6, a screen camera device 7, an impact control module, a screen blockage identification module, and a crushed stone sensor 3;

[0050] The screen 5 is divided into several screening surfaces 501 along its length.

[0051] A plurality of striking components 6 are arranged in a one-to-one correspondence with a plurality of screening surfaces 501. Each striking component 6 includes a plurality of magnetic striking bodies 601 evenly arranged below the screen 5 along the width direction of the screen 5, a connecting rope 602 evenly radially distributed around the striking body 601, a clamping member 603, and a receiving component 604 disposed below the striking body 601 and capable of vertical movement. One end of the connecting rope 602 is connected to the striking body 601, and the other end of the connecting rope 602 is fixedly connected to or detached from the screen 5 via the clamping member 603. When the rope 602 is fixedly connected to the screen 5, the screen 5 drives the striking body 601 to resonate through the connecting rope 602 to strike the corresponding screening surface 501, while the receiving component 604 descends to avoid the resonating striking body 601. At this time, the striking component 6 is in the striking working state. When the connecting rope 602 is disconnected from the screen 5, the screen 5 cannot drive the striking body 601 to resonate through the connecting rope 602, and the receiving component 604 rises to the vibration center position of the striking body 601 to receive and fix the striking body 601. At this time, the striking component 6 is in the idle working state.

[0052] The crushed stone sensor 3 is installed at the discharge port and the inlet of the screen box 2. When the crushed stone sensor 3 does not detect crushed stone at the inlet and the discharge port of the screen box 2, it means that there is no crushed stone conveyed by the vibrating screen on the screen and the screen is in an empty state. In this case, the crushed stone will not block the camera device 7 and prevent the camera device 7 from obtaining a complete and accurate real-time image of the screen. At this time, the crushed stone sensor 3 sends a camera command to the camera device 7.

[0053] The camera device 7 is installed on the inner wall of the top of the screen box 2 to acquire the original image of the screen and to receive camera commands to acquire the real-time image of the screen, and to send the original image and the real-time image information of the screen to the screen blockage identification module; in addition, multiple cameras 7 can be set along the length of the screen, and the real-time images of the screen acquired by multiple cameras 7 are stitched together to obtain a complete real-time image of the screen.

[0054] The screen blockage identification module includes: sending a stop command to the crushed stone conveyor belt 4 at intervals T to control the crushed stone conveyor belt 4 to stop crushed stone conveying and stop the vibrating screen from feeding, so that the camera device 7 can acquire real-time images of the screen; receiving the original screen image and sequentially numbering the screening surfaces 501 of the screen in the original screen image; receiving the real-time screen image and comparing it with the original screen image to identify the screening surfaces that are blocked in the screen, and sending the number information of the blocked screening surfaces to the tapping control module, while sending a start command to the crushed stone conveyor belt 4 to control the crushed stone conveyor belt 4 to convey crushed stone;

[0055] The tapping control module includes: controlling the snap-fit ​​component 603 of the corresponding tapping component 6 according to the numbering information of the screen surface where the blockage occurs, so that the connecting rope 602 is fixedly connected to or disconnected from the screen 5, and controlling the receiving component 604 to descend or rise accordingly, thereby changing the working state and working time of the corresponding tapping component 6, so that the system can perform a global sleep, global tapping or fixed-point tapping working mode.

[0056] Specifically, the striking control module is electrically connected to the snap-fit ​​component 603 and the receiving component 604. The striking control module controls the snap-fit ​​component 603 of the striking component 6 to fix or disconnect the connecting rope 602 from the screen 5. When the connecting rope 602 is fixedly connected to the screen 5, the striking control module controls the receiving component 604 to descend to avoid the receiving component 604 interfering with the vibration of the striking body 601. At this time, the striking component 6 is in the striking working state. When the connecting rope 602 is disconnected from the screen 5, the striking control module controls the receiving component 604 to descend. The system rises to the vibration center position of the striking body 601 and is fixed to the striking body 601. At this time, the striking component 6 is in an idle working state. Based on the above, the striking control module controls the corresponding snap-fit ​​component 603 of the striking component 6 according to the number of the screen surface where the blockage occurs, so that the connecting rope 602 is fixedly connected to or disconnected from the screen 5, and controls the receiving component 604 to descend or rise accordingly, thereby changing the working state and working time of the corresponding striking component 6, so that the system can perform a global sleep, global striking or fixed-point striking working mode.

[0057] Furthermore, in a preferred embodiment, the system also includes a human-machine interface, which includes: a function to input and set an interval time T to adjust the stopping interval of the crushed stone conveyor belt 4. The interval time T can be reasonably designed as needed, for example, the interval time T can be 30 minutes, 1 hour or 2 hours; a function to display the real-time image of the screen acquired by the camera device 7; and a function to issue commands to control the start and stop of the vibrating screen motor and the start and stop of the crushed stone conveyor belt 4.

[0058] Furthermore, in a preferred embodiment, the global sleep mode is defined as follows: when the number information of the blocked screening surface is empty, that is, when none of the screening surfaces are blocked, the tapping control module controls all tapping components 6 to be in an idle working state, so that when the vibrating screen is working, all tapping components 6 will not tap the screen 5.

[0059] The global tapping is as follows: when there are multiple numbers in the numbering information of the blocked screening surface and the numbers are not consecutive, the tapping control module groups the tapping components 6. First, it controls the first group of tapping components 6 to enter the tapping working state, while the other tapping components 6 are in the idle working state. Then, it controls the second group of tapping components 6 to enter the tapping working state, while the other tapping components 6 are in the idle working state. This process is repeated in sequence. In this way, when the vibrating screen is working, multiple groups of tapping components 6 will tap the corresponding screening surface 501 of the screen 5 in sequence.

[0060] The fixed-point tapping means that when there is only one number in the numbering information of the blocked screening surface, or when there are multiple numbers and the multiple numbers are consecutive, the tapping control module controls the tapping component 6 corresponding to the screening surface 501 to be in the tapping working state, while the tapping components 6 at other positions are in the idle working state. In this way, when the vibrating screen is working, the tapping component 6 will only tap the screening surface 501 that needs to be tapped on the screen 5.

[0061] Furthermore, in a preferred embodiment, during the global tapping, the tapping control module groups the tapping components 6 sequentially along the conveying direction of the crushed stone on the screen 5, thereby enabling multiple groups of tapping components 6 to sequentially and cyclically tap the screen 5 in a wave-like manner. For example, the screen 5 is divided into 5 screening surfaces 501 along its length, corresponding to 5 tapping components 6. The tapping control module divides the tapping components 6 into 5 groups along the conveying direction of the crushed stone on the screen 5, i.e., 1 tapping component 6 is 1 group. When the vibrating screen is turned on, the first group of tapping components 6 enters the tapping working state, while the other 4 groups of tapping components 6 are in an idle working state. Then, the second group of tapping components 6 is controlled to tap. When the striking component 6 enters the striking working state, the other 4 sets of striking components 6 remain idle. This process is repeated sequentially until all 5 sets of striking components 6 enter the striking working state, thus completing one cycle of wave-like striking. Then, the next cycle begins. Through this wave-like striking, firstly, the direction of the striking wave of the striking components is the same as the direction of the crushed stone conveying on the screen 5, thus avoiding any adverse effects on the conveying of the crushed stone and improving the conveying efficiency. Secondly, the wave-like striking is actually the intermittent and regular operation of each striking component 6, which reduces the wear and tear on the striking components 6 and extends the service life of the equipment.

[0062] Furthermore, in a preferred embodiment, please refer to Figure 7 or Figure 8Along the length of the screen 5, each of the striking components 6 located at odd-numbered positions has n striking bodies 601, and each of the striking components 6 located at even-numbered positions has m striking bodies 601, where n ≠ m, 2 ≤ n ≤ 5, and 2 ≤ m ≤ 5. Based on the above arrangement, when multiple sets of striking components 6 sequentially and cyclically strike the screen 5 along the conveying direction of the crushed stone, different striking forces and frequencies can be intermittently varied to improve the striking and cleaning effect of the screen.

[0063] Furthermore, in a preferred embodiment, the receiving component 604 includes a lifting member 6041 fixed to the screen box support 1 and located below the striking body 601, a receiving groove 6042 disposed on the top of the lifting member 6041 for receiving the striking body 601, and an electromagnet (not shown in the figure) disposed in the receiving groove 6042; wherein, the striking control module is electrically connected to the lifting member 604 and the electromagnet, and when the connecting rope 602 is fixedly connected to the screen 5, the striking control module controls the lifting member 6041 to descend, thereby driving the receiving groove 604... 2. When the device descends, the striking control module simultaneously de-energizes the electromagnet to prevent the receiving component 604 from interfering with the vibration of the striking body 601. When the connecting rope 602 detaches from the screen 5, the striking control module controls the lifting component 6041 to rise, thereby driving the receiving groove 6042 to the vibration center position of the striking body 601. At the same time, the striking control module controls the electromagnet to generate magnetic force to receive and fix the detached striking body 601 by magnetic attraction. This not only facilitates the storage of the striking body 601, but also does not affect the vibration of the striking body.

[0064] Furthermore, in a preferred embodiment, the lifting component 604 is a hydraulic cylinder or a pneumatic cylinder.

[0065] Furthermore, in a preferred embodiment, the striking body 601 is spherical or frustum-shaped, and its surface is coated with a polytetrafluoroethylene (PTFE) coating. The spherical or frustum-shaped striking body 601, with its smooth surface curves, reduces the obstruction of the mass block placed below the screen to the gravel. The PTFE coating on the surface of the striking body 601 has a very low coefficient of friction and excellent chemical resistance, preventing small-diameter gravel from adhering to the mass block. Additionally, the PTFE coating has good insulation properties, isolating the gravel from static electricity generated by friction, thus preventing gravel adhesion.

[0066] Furthermore, in a preferred embodiment, please refer to Figure 6The striking body 601 has a filling cavity 6011 inside, and the outer wall of the striking body 601 has a filling hole 6012 communicating with the filling cavity 6011. The filling hole 6012 is covered with a removable sealing cap 6013. The filling cavity 6011 is filled with fillers of different weights to adjust the weight of the striking body 601. The filler should have a certain fluidity to facilitate filling or unloading. Preferably, the filler is fine sand, water or small steel balls.

[0067] Furthermore, in a preferred embodiment, please refer to Figure 7 and Figure 8 The connecting rope 602 is an elastic rope, and the striking body 601 is connected to the connecting rope 602 in at least two directions.

[0068] In this invention, please refer to Figure 7 and Figure 8 The number of connecting ropes connected to each striking body, the correlation pattern between the connecting ropes, and the mass, arrangement, and position of the striking bodies can be optimized based on factors such as screen size, screen inclination angle, screen aperture, screen mass, and vibrating screen excitation frequency. This reduces energy consumption in vibration cleaning and improves the screening effect. For example, firstly, based on the vibrating screen used, information such as the vibrating screen model, excitation method, excitation frequency, screen size, screen aperture size, type of material to be screened, material particle size, and screen clogging status is collected. Secondly, the vibration of the striking bodies is studied, investigating the influence of factors such as the vibrating screen excitation method, striking body mass, connecting rope length, connecting rope stiffness, striking body assembly method, and connecting rope interaction method on the striking body vibration. This analysis of the striking bodies under various influences... The first to third vibration modes under the influence of various factors were selected as the design basis for the optimal effect of screen impact. The influence formulas of each factor on the natural frequency of the impactor were derived experimentally, and the effects of the impactor mass and amplitude on the effective cleaning area radius of the screen when a single impactor strikes it were determined. Finally, based on the optimal vibration mode, the mass and shape of the impactor were selected, and the arrangement of the impactors was designed according to the screen size and the effective cleaning area radius. When arranging the impactors, at least one-third overlap of the effective cleaning areas of adjacent impactors should be considered to ensure cleaning effectiveness. The placement position of each impactor and the length of the connecting rope were determined based on the overlap requirements of the cleaning area. The stiffness of the connecting rope was designed based on the determined impactor mass and connecting rope length.

[0069] Furthermore, in a preferred embodiment, please refer to Figure 4 and Figure 5The latching component 603 is an electromagnetic latch, comprising an upper latch 6031 fixed to the bottom of the screen 5 with the latch facing downwards, a lower latch 6034 fixed to the screen box support 1 with the latch facing upwards and engaging with the upper latch 6031, a lifting spring 6033 disposed within the lower latch 6034, a magnetic fixing head 6032 housed in the slot formed by the lower latch 6034 and the upper latch 6031, and a guide groove 6035 disposed on one side of the lower latch 6034 and misaligned with the upper latch 6031; the upper latch 6031 and the lower latch 6034 are internally provided with An electromagnet (not shown in the figure); the connecting rope 602 passes through the guide groove 6035 and is connected to the fixing head 6032; in the above structure, the striking control module is electrically connected to the snap-fit ​​component 603. When it is necessary to control the snap-fit ​​component 603 to keep the connecting rope 602 connected to the bottom of the screen 5, the striking control module controls the electromagnet in the upper snap-fit ​​6031 to be energized to continuously generate magnetic force, and at the same time controls the electromagnet in the lower snap-fit ​​6034 to be de-energized. Under the action of magnetic force, the fixing head 6032 is snapped and fixed in the upper snap-fit ​​6031. The connecting rope 602 passes through the fixing head 6032 and the upper snap-fit ​​6032. The buckle 6031 remains connected to the screen 5; similarly, when it is necessary to control the latch 603 to disengage the connecting rope 602 from the bottom of the screen 5, the tapping control module de-energizes the electromagnet in the upper buckle 6031, while simultaneously energizing the electromagnet in the lower buckle 6034 to continuously generate magnetic force. The fixing head 6032 is then held and fixed within the lower buckle 6034 under the influence of this magnetic force, and the connecting rope 602 is disengaged from the screen 5. When the connecting rope 602 switches from a connected state to a disengaged state from the bottom of the screen 5, the fixing head 6032 itself... Under the influence of gravity of the striking body, the fixed head 6032 can fall more smoothly from the upper buckle 6031 into the lower buckle 6034 and be held by the lower buckle 6034. When the connecting rope 602 and the bottom of the screen 5 change from being disconnected to being connected, the weight of the fixed head 6032 itself and the weight of the striking body will hinder the upward movement of the fixed head 6032. The lifting spring 6033 can lift the fixed head 6032 so that it moves closer to the upper buckle 6031, which will help the upper buckle 6031 to pick up and fix the fixed head 6032.

Claims

1. A multi-mode impact-based anti-clogging self-cleaning crushed stone vibrating screening system, comprising a screen box support (1), a screen box (2) mounted on the screen box support (1), a vibrating screen motor mounted on the screen box (2), a screen mesh (5) mounted inside the screen box (2) for vibrating and screening the crushed stone, and a crushed stone conveyor belt (4) whose discharge end is connected to the inlet of the screen box (2), characterized in that, Also includes: Several striking components (6), screen camera device (7), striking control module, screen blockage identification module, and stone sensor (3). The screen (5) is divided into several screening surfaces (501) along its length. A plurality of the aforementioned striking components (6) are arranged in a one-to-one correspondence with a plurality of the aforementioned screening surfaces (501). Each striking component (6) includes a plurality of striking bodies (601) that are uniformly arranged below the screen (5) along the width direction of the screen (5) and have magnetic properties, a connecting rope (602) that is uniformly radially distributed around the striking body (601), a snap fastener (603), and a receiving component (604) that is arranged below the striking body (601) and can be raised and lowered. The connecting rope (602) One end is connected to the striking body (601), and the other end of the connecting rope (602) is fixedly connected to or disconnected from the screen (5) through a snap fastener (603). When the connecting rope (602) is fixedly connected to the screen (5), the receiving component (604) descends to avoid the resonant striking body (601), and at this time the striking component (6) is in the striking working state; when the connecting rope (602) is disconnected from the screen (5), the receiving component (604) descends to avoid the resonant striking body (601), and the striking component (6) is in the striking working state; when the connecting rope (602) is disconnected from the screen (5), the receiving component (604) descends to avoid the resonant striking body (601), and the striking component (6) is in the striking working state. 04) The impact assembly (6) is raised to the vibration center position of the impact body (601) and fixed to the impact body (601). At this time, the impact assembly (6) is in an idle working state. The snap fastener (603) is an electromagnetic snap fastener, which includes an upper snap fastener (6031) fixed to the bottom of the screen (5) with the snap opening facing down, a lower snap fastener (6034) fixed to the screen box support (1) with the snap opening facing up and cooperating with the upper snap fastener (6031), and a lifting spring set in the lower snap fastener (6034). A spring (6033), a magnetic fixing head (6032) housed in the slot formed by the lower buckle (6034) and the upper buckle (6031), and a guide groove (6035) disposed on one side of the lower buckle (6034) and offset from the upper buckle (6031); electromagnets are provided inside the upper buckle (6031) and the lower buckle (6034); the connecting rope (602) passes through the guide groove (6035) and connects to the fixing head (6032); The crushed stone sensor (3) is installed at the discharge port and the inlet of the screen box (2). When the crushed stone sensor (3) does not detect crushed stone at the inlet and the discharge port of the screen box (2), it sends a camera command to the screen camera device (7). The screen camera device (7) is installed on the top inner wall of the screen box (2) to obtain the original image of the screen and to receive the camera instruction to obtain the real-time image of the screen, and to send the original image and real-time image information of the screen to the screen blockage identification module. The screen blockage identification module includes: sending a stop command to the crushed stone conveyor belt (4) at regular intervals to control the crushed stone conveyor belt (4) to stop crushed stone conveying; receiving the original screen image and numbering the screening surfaces (501) of the screen in the original screen image in sequence; receiving the real-time screen image and comparing it with the original screen image to identify the screening surfaces in the screen that are blocked, and sending the number of the blocked screening surfaces to the tapping control module, while sending a start command to the crushed stone conveyor belt (4) to control the crushed stone conveyor belt (4) to convey crushed stone; The tapping control module includes: controlling the snap-fit ​​component (603) of the corresponding tapping component (6) according to the number of the screen surface where the blockage occurs, so that the connecting rope (602) and the screen (5) can switch between two states of fixed connection or mutual disconnection, and controlling the receiving component (604) to descend or rise accordingly, thereby changing the working state and working time of the corresponding tapping component (6) so that the system can perform a global sleep, global tapping or fixed-point tapping working mode.

2. The anti-clogging self-cleaning crushed stone vibrating screening system based on multi-mode impact as described in claim 1, characterized in that: The global hibernation means that when the number information of the blocked screening surface is empty, the knocking control module controls all knocking components (6) to be in an idle working state, so that when the vibrating screen is working, all knocking components (6) will not knock on the screen (5); The global tapping is as follows: when there are multiple numbers in the numbering information of the blocked screening surface and the multiple numbers are not consecutive, the tapping control module will group the tapping components (6), first control the first group of tapping components (6) to enter the tapping working state, while the other tapping components (6) are in the idle working state, then control the second group of tapping components (6) to enter the tapping working state, while the other tapping components (6) are in the idle working state, and so on in the above manner. In this way, when the vibrating screen is working, multiple groups of tapping components (6) will tap the corresponding screening surface (501) of the screen (5) in sequence. The fixed-point tapping means that when there is only one number in the numbering information of the blocked screening surface, or when there are multiple numbers and the multiple numbers are consecutive, the tapping control module controls the tapping component (6) corresponding to the screening surface (501) to be in the tapping working state, while the tapping components (6) at other positions are in the idle working state. In this way, when the vibrating screen is working, the tapping component (6) will only tap the screening surface (501) that the screen (5) needs to be tapped.

3. The anti-clogging self-cleaning stone vibrating screening system based on multi-mode impact as described in claim 2, characterized in that, During the global tapping, the tapping control module groups the tapping components (6) sequentially along the conveying direction of the crushed stone on the screen (5), thereby enabling multiple groups of tapping components (6) to perform wave-like tapping on the screen (5) in a sequential cycle.

4. The anti-clogging self-cleaning stone vibrating screening system based on multi-mode impact as described in claim 3, characterized in that, Along the length of the screen (5), all the striking components (6) located at odd-numbered positions are provided with n Each striking body (601), and the striking components (6) located at even-numbered positions are all provided with m 601 striking bodies, among which n ≠ m， 2≤ n ≤5, 2≤ m ≤5.

5. The anti-clogging self-cleaning stone vibrating screening system based on multi-mode impact as described in claim 1, characterized in that, The receiving component (604) includes a lifting member (6041) fixed on the screen box support (1) and located below the striking body (601), a receiving groove (6042) set on the top of the lifting member (6041) for receiving the striking body (601), and an electromagnet set in the receiving groove (6042).

6. The anti-clogging self-cleaning stone vibrating screening system based on multi-mode impact as described in claim 5, characterized in that, The lifting component (6041) is a hydraulic cylinder or a pneumatic cylinder.

7. The anti-clogging self-cleaning vibrating screen system for crushed stone based on multi-mode impact as described in claim 1, characterized in that, The striking body (601) is spherical or frustum-shaped, and the surface of the striking body (601) is coated with polytetrafluoroethylene.

8. The anti-clogging self-cleaning stone vibrating screening system based on multi-mode impact as described in claim 7, characterized in that, The striking body (601) has a filling cavity (6011) inside, and the outer wall of the striking body (601) has a filling hole (6012) communicating with the filling cavity (6011). The filling hole (6012) is covered with a removable sealing cap (6013). The filling cavity (6011) is filled with fillers of different weights to adjust the weight of the striking body (601).

9. The anti-clogging self-cleaning vibrating screen system for crushed stone based on multi-mode impact as described in claim 1, characterized in that, The connecting rope (602) is an elastic rope, and the striking body (601) is connected to the connecting rope (602) in at least two directions.

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